#!/bin/sh
# Start/stop/restart haveged.

PIDFILE=/var/run/haveged.pid
HAVEGED_OPTS="-w 1024 -v 1 -p $PIDFILE"

# Start haveged:
haveged_start() {
  if [ -f $PIDFILE ]; then
    echo "HAVEGE daemon is already running as PID $(cat  $PIDFILE) " >&2
    exit 3
  elif [ -x /sbin/haveged ]; then
    echo "Starting HAVEGE daemon:  /sbin/haveged"
    /sbin/haveged $HAVEGED_OPTS
  fi
}

# Stop haveged:
haveged_stop() {
  if [ -r /var/run/haveged.pid ]; then
    kill $(cat /var/run/haveged.pid)
  else
    killall haveged
  fi
}

# Restart haveged:
haveged_restart() {
  haveged_stop
  sleep 1
  haveged_start
}

case "$1" in
'start')
  haveged_start
  ;;
'stop')
  haveged_stop
  ;;
'restart')
  haveged_restart
  ;;
*)
  echo "usage $0 start|stop|restart"
  exit 2
esac
